阅读说明：本技术 一种增粘剂、其制备方法及包含其的双组分液体硅橡胶胶黏剂 (Tackifier, preparation method thereof and bi-component liquid silicone rubber adhesive containing tackifier ) 是由 李福中 庞文键 付子恩 刘润威 徐建明 于 2019-12-04 设计创作，主要内容包括：本发明提供一种增粘剂、其制备方法及包含其的双组分液体硅橡胶胶黏剂。所述增粘剂的制备原料按重量份数计包括：3-甲基丙烯酰氧基丙基三甲氧基硅烷50-80份、氨基苯基三甲氧基硅烷30-60份、γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷10-30份、乙烯基三乙氧基硅烷5-20份、pH调节剂5-15份、水30-50份和助溶剂70-90。所述胶黏剂包括A组分和B组分；所述A组分包括：基料、含氢硅油交联剂、扩链剂、如前所述的增粘剂和抑制剂；所述B组分按重量份数计包括：基料和催化剂。本发明所述胶黏剂对于多种基材均具有良好的粘接效果,在各组分协同增效作用下,其耐温性进一步提高,可以长期在高温环境中使用。(The invention provides a tackifier, a preparation method thereof and a bi-component liquid silicone rubber adhesive containing the tackifier. The tackifier comprises the following preparation raw materials in parts by weight: 50-80 parts of 3-methacryloxypropyltrimethoxysilane, 30-60 parts of aminophenyltrimethoxysilane, 10-30 parts of gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, 5-20 parts of vinyl triethoxysilane, 5-15 parts of pH regulator, 30-50 parts of water and 70-90 parts of cosolvent. The adhesive comprises a component A and a component B; the component A comprises: base stock, hydrogen-containing silicone oil cross-linking agent, chain extender, tackifier and inhibitor as previously described; the component B comprises the following components in parts by weight: a binder and a catalyst. The adhesive disclosed by the invention has a good bonding effect on various base materials, the temperature resistance of the adhesive is further improved under the synergistic effect of the components, and the adhesive can be used in a high-temperature environment for a long time.)

1. The tackifier is characterized by comprising the following raw materials in parts by weight: 50-80 parts of 3-methacryloxypropyltrimethoxysilane, 30-60 parts of aminophenyltrimethoxysilane, 10-30 parts of gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, 5-20 parts of vinyl triethoxysilane, 5-15 parts of pH regulator, 30-50 parts of water and 70-90 parts of cosolvent.

2. The adhesion promotion agent of claim 1 wherein the pH adjustment agent comprises any one or a combination of at least two of acetic acid, hydrochloric acid, or carbonic acid;

preferably, the cosolvent comprises any one or a combination of at least two of ethanol, ethylene glycol, propylene glycol or glycerol, preferably ethanol and glycerol;

preferably, the tackifier has a pH of 6 to 8.

3. The process for the preparation of a tackifier according to claim 1 or 2, comprising the following steps:

(1) mixing and stirring 3-methacryloxypropyltrimethoxysilane, aminophenyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, vinyl triethoxysilane, water and a cosolvent according to the formula ratio, and reacting to obtain a hydrolysate;

(2) and (2) adding a pH regulator into the hydrolysate obtained in the step (1), and mixing and stirring to obtain the tackifier.

4. The method as claimed in claim 3, wherein the temperature of the stirring in step (1) is 100-120 ℃;

preferably, the stirring time in the step (1) is 120-150 min;

preferably, the stirring temperature of the step (2) is 20-30 ℃;

preferably, the stirring time of the step (2) is 5-10 min.

5. The bi-component liquid silicone rubber adhesive is characterized by comprising a component A and a component B;

the component A comprises the following components in parts by weight: 80-120 parts of base material, 1-20 parts of hydrogen-containing silicone oil cross-linking agent, 0.1-5 parts of chain extender, 0.1-5 parts of tackifier as claimed in claim 1 or 2 and 0.005-0.2 part of inhibitor;

the component B comprises the following components in parts by weight: 80-120 parts of base material and 0.1-5 parts of catalyst.

6. The two-component liquid silicone rubber adhesive according to claim 5, wherein the mass ratio of the A component to the B component is (0.8-1.2):1, preferably 1: 1.

7. The two-component liquid silicone rubber adhesive according to claim 5 or 6, wherein the base materials of the component A and the component B comprise, by weight, α, 80-120 parts of omega-divinyl polydimethylsiloxane, 80-120 parts of ferric oxide and 1-15 parts of fumed silica;

preferably, the α, omega-divinylpolydimethylsiloxane has a viscosity of 1000-;

preferably, the α, omega-divinylpolydimethylsiloxane has a vinyl content of 0.1 to 0.4%;

preferably, the particle size of the ferric oxide is 5-15 μm;

preferably, the specific surface area of the fumed silica is 100-380m²/g；

Preferably, the hydrogen-containing silicone oil cross-linking agent is branched chain type hydrogen-containing silicone oil;

preferably, the branched hydrogen-containing silicone oil has a hydrogen content of 0.36-0.56 wt%;

preferably, the chain extender is hydrogen-terminated silicone oil;

preferably, the hydrogen content of the hydrogen-terminated silicone oil is 0.05% -0.1%;

preferably, the inhibitor comprises any one or a combination of at least two of 1-ethynyl-cyclohexanol, 2-methyl-3-butyn-2-ol, 2-methyl-1-hexyn-3-ol, 3, 5-dimethyl-1-ethynyl-3-ol or 3,7, 11-trimethyl-1-dodecayn-3-ol.

8. The two-part liquid silicone rubber adhesive according to any of claims 5-7, wherein the catalyst is a platinum catalyst;

preferably, the platinum content in the platinum catalyst is 1000-5000 ppm;

preferably, the platinum catalyst comprises any one or a combination of at least two of platinum vinylsiloxane, platinum-alkyne chelate or chloroplatinic acid;

preferably, the platinumvinyl siloxane comprises any one of or a combination of at least two of a tetramethyltetravinylcyclotetrasiloxane chloroplatinate complex, a tetramethyldivinyldisiloxane chloroplatinate complex or a diphenyldivinyltetrachlorodisiloxane complex chloroplatinate;

preferably, the platinum-alkynylsulphate chelate comprises any one of or a combination of at least two of bis (alkynylbis (triphenylphosphine) platinum chelate or bis (alkynylbis) (cyclodialkenyl) chelate.

9. The method for preparing the two-component liquid silicone rubber adhesive according to any one of claims 5 to 8, wherein the method comprises the following steps:

(1) mixing and stirring the base material, the hydrogen-containing silicone oil cross-linking agent, the chain extender, the tackifier as claimed in claim 1 or 2 and the inhibitor according to the formula amount to prepare a component A; mixing and stirring the base material and the catalyst according to the formula amount to prepare a component B;

(2) mixing the component A and the component B obtained in the step (1) to obtain the bi-component liquid silicone rubber adhesive;

preferably, in the step (1), the stirring time for preparing the component A and the component B is 30-40 min;

preferably, in the step (1), the stirring temperature for preparing the component A and the component B is 20-30 ℃;

preferably, the mixing time of the step (2) is 5-10 min;

preferably, the temperature of said mixing in step (2) is 20-30 ℃.

10. Use of the two-component liquid silicone rubber adhesive according to any one of claims 5 to 8 for bonding aluminum substrates, stainless steel substrates, glass substrates or ceramic substrates.

Technical Field

The invention belongs to the field of adhesives, and particularly relates to a tackifier, a preparation method thereof and a bi-component liquid silicone rubber adhesive containing the tackifier.

Background

With the rapid development of industries such as electronic and electric products, automobile industry and the like, various electronic components and automobile accessories, particularly automobile engines, have higher and higher requirements on the heat resistance of the silicone rubber, and the environmental protection requirements on the silicone rubber are stricter and stricter. Silicone rubber adhesives are mainly classified into two main categories according to the vulcanization mechanism: one is a room temperature vulcanizing adhesive of a condensation type vulcanization mechanism, and the other is an addition type adhesive of a hydrosilylation type vulcanization mechanism. The condensed type adhesive has low vulcanization speed, limited vulcanization thickness and is influenced by the temperature and humidity of the environment, in addition, small molecular volatile matters are released in the vulcanization process, potential risks of swelling, corrosion and the like exist on certain specific materials, and the condensed type adhesive is limited in certain application fields, especially in the application fields with strict requirements on pursuit efficiency and occupational health; the addition type silicone rubber adhesive has no byproduct release in the vulcanization process, is neutral, nontoxic and noncorrosive, has high vulcanization efficiency, is more and more favored in the electronic and electrical industry, and relates to the use of the addition type silicone rubber adhesive, such as the adhesion of heating ceramic wafers of air conditioner heaters, the heat conduction adhesion fixation of heating components in the electronic industry and the like.

Most of traditional double-component addition type silicone rubber is heat-conducting pouring sealant and the like, and the traditional double-component addition type silicone rubber has no adhesion to a base material, or is easy to cause the breakage of internal chemical bonds after being used for a long time under a high-temperature condition (more than 250 ℃), so that the colloid falls off from the base material piece, the adhesion effect is lost, and components are damaged. The single-component addition type silicone rubber is difficult to be widely used due to the harsh storage conditions.

CN102627860A discloses a preparation method of flame-retardant, high-low temperature-resistant and high-thermal-conductivity addition type silicone rubber, which mainly explains the curing and molding of single-component addition type silicone rubber, and cerium oxide is added as a temperature-resistant material. The single-component addition type liquid silicone rubber is extremely harsh to store, and cerium oxide has certain toxicity, so that the addition type silicone rubber disclosed in the patent does not have the adhesive effect on a base material.

CN102532917A discloses a high temperature resistant liquid silicone rubber and a preparation method thereof. The liquid silicone rubber is prepared from a component A and a component B according to a mass ratio of 1: 10-10: 1; the component A is composed of base rubber and a platinum complex according to a certain proportion, the component B is composed of base rubber, hydrogen-containing polysiloxane and alkynol inhibitor according to a certain proportion, and the base rubber is composed of three vinyl-terminated organopolysiloxanes with different viscosities and vinyl contents, silicon dioxide and a high-temperature-resistant additive according to a certain proportion. However, when the hydrogen-containing polysiloxane is still used at high temperature for a long time, the hydrogen-containing polysiloxane is easy to break internal chemical bonds, so that the colloid falls off from the base material and loses the adhesive effect.

Therefore, the development of the high-temperature-resistant liquid silicone rubber has important significance and wide application value.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a tackifier, a preparation method thereof and a bi-component liquid silicone rubber adhesive containing the tackifier, wherein the adhesive has good adhesion and can be used for a long time under a high-temperature condition.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the invention provides a tackifier, which comprises the following preparation raw materials in parts by weight: 50-80 parts of 3-methacryloxypropyltrimethoxysilane, 30-60 parts of aminophenyltrimethoxysilane, 10-30 parts of gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, 5-20 parts of vinyl triethoxysilane, 5-15 parts of pH regulator, 30-50 parts of water and 70-90 parts of cosolvent.

In the tackifier of the invention, the 3-methacryloxypropyltrimethoxysilane is 50 to 80 parts by weight, for example, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, 62 parts, 64 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts and 80 parts.

In the tackifier of the invention, the amino phenyl trimethoxy silane is 30 to 60 parts by weight, for example, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts and 60 parts.

In the tackifier of the invention, the weight parts of the gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane are 10-30 parts, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts and 30 parts.

In the tackifier of the present invention, the vinyl triethoxysilane may be 5 to 20 parts by weight, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts.

In the tackifier of the present invention, the pH adjuster may be 5 to 15 parts by weight, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, and 15 parts.

In the tackifier of the present invention, the water may be 30 to 50 parts by weight, for example, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts.

In the tackifier of the present invention, the weight part of the cosolvent is 70 to 90 parts, and may be, for example, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, or 90 parts.

The tackifier is 3-methacryloxypropyltrimethoxysilane, aminophenyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane and vinyl triethoxysilane, and the four silanes are matched with each other, so that the synergistic effect is achieved, the rheological property and the flexibility of the tackifier can be improved, and the toughness and the bonding property of the tackifier can be improved. The composite tackifier provides good fluidity and adhesiveness for the adhesive disclosed by the invention.

Preferably, the pH adjusting agent comprises any one of acetic acid, hydrochloric acid or carbonic acid or a combination of at least two thereof.

Preferably, the co-solvent comprises any one or a combination of at least two of ethanol, ethylene glycol, propylene glycol or glycerol, preferably ethanol and glycerol.

Preferably, the viscosifier has a pH of 6 to 8, which may be, for example, 6, 7, 8.

In a second aspect, the present invention provides a method for preparing the tackifier according to the first aspect, the method comprising the steps of:

(1) mixing and stirring 3-methacryloxypropyltrimethoxysilane, aminophenyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, vinyl triethoxysilane, water and a cosolvent according to the formula ratio, and reacting to obtain a hydrolysate;

(2) and (2) adding a pH regulator into the hydrolysate obtained in the step (1), and mixing and stirring to obtain the tackifier.

Preferably, the stirring temperature in step (1) is 100 ℃ and 120 ℃, for example, 100 ℃, 120 ℃, 140 ℃, 160 ℃, 180 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃, 280 ℃, 300 ℃.

Preferably, the stirring time in step (1) is 120-150min, such as 120min, 122min, 124min, 126min, 128min, 130min, 132min, 134min, 136min, 138min, 140min, 142min, 144min, 146min, 148min, 150 min.

Preferably, the stirring temperature in step (2) is 20-30 deg.C, such as 20 deg.C, 21 deg.C, 22 deg.C, 23 deg.C, 24 deg.C, 25 deg.C, 26 deg.C, 27 deg.C, 28 deg.C, 29 deg.C, 30 deg.C.

Preferably, the stirring time in step (2) is 5-10min, such as 5min, 6min, 7min, 8min, 9min, 10 min.

In a third aspect, the invention provides a bi-component liquid silicone rubber adhesive, which comprises a component A and a component B;

the component A comprises the following components in parts by weight: 80-120 parts of base material, 1-20 parts of hydrogen-containing silicone oil cross-linking agent, 0.1-5 parts of chain extender, 0.1-5 parts of tackifier and 0.005-0.2 part of inhibitor according to the first aspect;

the component B comprises the following components in parts by weight: 80-120 parts of base material and 0.1-5 parts of catalyst.

In the component A of the adhesive, the weight parts of the base material are 80-120 parts, for example, 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 100 parts, 102 parts, 104 parts, 106 parts, 108 parts, 110 parts, 112 parts, 114 parts, 116 parts, 118 parts and 120 parts.

In the component A of the adhesive, the hydrogen-containing silicone oil crosslinking agent is 1-20 parts by weight, and can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts and 20 parts, for example.

In the component A of the adhesive, the weight part of the chain extender is 0.1-5 parts, for example, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 2 parts, 3 parts, 4 parts and 5 parts.

In the component a of the adhesive of the present invention, the tackifier according to the first aspect may be 0.1 to 5 parts by weight, for example, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 2 parts, 3 parts, 4 parts, and 5 parts.

In the component A of the adhesive, the weight part of the inhibitor is 0.005-0.2 part, and can be, for example, 0.005 part, 0.006 part, 0.007 part, 0.008 part, 0.009 part, 0.01 part, 0.02 part, 0.04 part, 0.06 part, 0.08 part, 0.1 part, 0.12 part, 0.14 part, 0.16 part, 0.18 part and 0.2 part.

In the component B of the adhesive, the weight parts of the base material are 80-120 parts, for example, 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 100 parts, 102 parts, 104 parts, 106 parts, 108 parts, 110 parts, 112 parts, 114 parts, 116 parts, 118 parts and 120 parts.

In the component B of the adhesive, the weight part of the catalyst is 0.1-5 parts, such as 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 2 parts, 3 parts, 4 parts and 5 parts.

Preferably, the mass ratio of the A component and the B component is (0.8-1.2):1, and may be, for example, 0.8:1, 0.9:1, 1:1, 1.1:1, 1.2:1, preferably 1: 1.

Preferably, the base materials of the component A and the component B comprise, by weight, α, 80-120 parts of omega-divinyl dimethyl silicone, 80-120 parts of ferric oxide and 1-15 parts of fumed silica.

In the base material of the component A and the component B, the α, omega-divinyl polydimethylsiloxane is 80-120 parts by weight, and can be 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 100 parts, 102 parts, 104 parts, 106 parts, 108 parts, 110 parts, 112 parts, 114 parts, 116 parts, 118 parts and 120 parts by weight.

In the base material of the component A and the component B, the weight portion of the ferric oxide is 80-120, for example, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120.

In the base material of the component A and the component B, the fumed silica is 1 to 15 parts by weight, for example, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts and 15 parts.

According to the invention, the problem of harsh storage conditions of single-component addition type is solved in a double-component mode, the temperature resistance of the single-component addition type liquid silicone rubber adhesive is mainly increased by adding the ferric oxide filler, the synergistic effect of the mutual matching of the four silanes in the self-made tackifier is realized, the surfaces of the fumed silica and the ferric oxide simultaneously contain a large number of active group Si-H groups, all the components are connected through chemical bonds, and the particles are more tightly combined, so that the heat resistance of the single-component addition type liquid silicone rubber adhesive is further improved, the single-component addition type liquid silicone rubber adhesive can be used in an environment with the temperature of more than 250 ℃ for a long time, and the addition type liquid silicone rubber adhesive can. Has good bonding effect on base materials such as aluminum, stainless steel, glass, ceramics and the like. In addition, the fumed silica plays a reinforcing role in the liquid silicone rubber binder disclosed by the invention, and the requirements of white or semitransparent products are met. The fumed silica has super strong adhesion, tear resistance, heat resistance and ageing resistance.

Preferably, the viscosity of the α, omega-divinylpolydimethylsiloxanes is 1000-20000mpa.s, which may be, for example, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 12000, 14000, 15000, 16000, 18000, 20000 mpa.s.

Preferably, the α, omega-divinylpolydimethylsiloxane has a vinyl content of 0.1 to 0.4%, and may be, for example, 0.1%, 0.12%, 0.14%, 0.16%, 0.18%, 0.2%, 0.22%, 0.24%, 0.26%, 0.28%, 0.3%, 0.32%, 0.34%, 0.36%, 0.38%, 0.4%.

Preferably, the particle size of the iron sesquioxide is 5 to 15 μm, and may be, for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, or 15 μm.

Preferably, the specific surface area of the fumed silica is 100-380m²G, may be, for example, 100m²/g、110m²/g、120m²/g、130m²/g、140m²/g、150m²/g、160m²/g、170m²/g、180m²/g、190m²/g、200m²/g、220m²/g、240m²/g、260m²/g、280m²/g、300m²/g、320m²/g、340m²/g、360m²/g、380m²/g。

Preferably, the hydrogen-containing silicone oil cross-linking agent is branched-chain hydrogen-containing silicone oil. The adhesive is beneficial to obtaining higher strength and toughness. The branched chain type hydrogen-containing silicone oil branched chain hydrogen-containing polysiloxane is hydrogen-containing silicone oil containing partial T chain links, and the T chain links form a branched chain structure by molecules formed by hydrolysis of raw materials possibly containing a small amount of methyltrichlorosilane and silicon trichloride. The position and the number of the silicon-hydrogen bonds on the molecular chain have direct influence on the performance of the addition type liquid silicone rubber, and when the branched chain type hydrogen-containing silicone oil is used, the molecular chain is increased by crosslinking polysiloxane molecules, so that the mechanical strength of the silicone rubber can be greatly increased. When the content of the silicon-hydrogen bonds in the molecular chain is higher, the hardness of the vulcanized rubber is generally higher, and when the content of the silicon-hydrogen bonds is lower, the elongation at break is higher.

Preferably, the branched hydrogen-containing silicone oil has a hydrogen content of 0.36 to 0.56 wt%, and may be, for example, 0.36%, 0.38%, 0.4%, 0.42%, 0.44%, 0.46%, 0.48%, 0.5%, 0.52%, 0.54%, 0.56%.

Preferably, the chain extender is hydrogen-terminated silicone oil. The adhesive is beneficial to obtaining higher strength and toughness. The hydrogen-terminated group has larger reactivity, so that the reaction rate is accelerated, the tear strength of the vulcanized rubber is improved, and meanwhile, the hydrogen-terminated group is crosslinked with polysiloxane molecules to increase molecular chains, so that the mechanical strength of the silicone rubber is greatly improved.

The terminal hydrogen-containing silicone oil is polysiloxane which introduces a silicon-hydrogen bond at the tail end of the terminal by utilizing a Si-H bond on the terminal group of the hydrogen-containing silicone oil through hydrosilation reaction.

Preferably, the hydrogen content of the hydrogen-terminated silicone oil is 0.05% -0.1%;

preferably, the inhibitor comprises any one or a combination of at least two of 1-ethynyl-cyclohexanol, 2-methyl-3-butyn-2-ol, 2-methyl-1-hexyn-3-ol, 3, 5-dimethyl-1-ethynyl-3-ol or 3,7, 11-trimethyl-1-dodecayn-3-ol.

Preferably, the catalyst is a platinum catalyst.

Preferably, the platinum content in the platinum catalyst is 1000-5000ppm, and may be, for example, 1000ppm, 1500ppm, 2000ppm, 2500ppm, 3000ppm, 3500ppm, 4000ppm, 4500ppm, 5000 ppm.

Preferably, the platinum catalyst comprises any one or a combination of at least two of platinum vinylsiloxane, platinum-alkyne chelate, or chloroplatinic acid.

Preferably, the platinumvinyl siloxane comprises any one of or a combination of at least two of a tetramethyltetravinylcyclotetrasiloxane chloroplatinate complex, a tetramethyldivinyldisiloxane chloroplatinate complex or a diphenyldivinyltetrachlorodisiloxane complex chloroplatinate;

preferably, the platinum-alkynylsulphate chelate comprises any one of or a combination of at least two of bis (alkynylbis (triphenylphosphine) platinum chelate or bis (alkynylbis) (cyclodialkenyl) chelate.

In a fourth aspect, the invention provides a preparation method of the two-component liquid silicone rubber adhesive in the third aspect, wherein the preparation method comprises the following steps:

(1) mixing and stirring the base material, the hydrogen-containing silicone oil cross-linking agent, the chain extender, the tackifier and the inhibitor in the first aspect according to the formula amount to prepare a component A; mixing and stirring the base material and the catalyst according to the formula amount to prepare a component B;

(2) and (2) mixing the component A and the component B obtained in the step (1) to obtain the bi-component liquid silicone rubber adhesive.

Preferably, in step (1), the stirring time for preparing the component A and the component B is 30-40min, such as 30min, 32min, 34min, 36min, 38min and 40 min.

Preferably, in step (1), the stirring temperature for preparing both the A-component and the B-component is 20-30 deg.C, and may be, for example, 20 deg.C, 22 deg.C, 24 deg.C, 26 deg.C, 28 deg.C, 30 deg.C.

Preferably, the mixing time in step (2) is 5-10min, such as 5min, 6min, 7min, 8min, 9min, 10 min.

Preferably, the mixing temperature in step (2) is 20-30 deg.C, such as 20 deg.C, 21 deg.C, 22 deg.C, 23 deg.C, 24 deg.C, 25 deg.C, 26 deg.C, 27 deg.C, 28 deg.C, 29 deg.C, 30 deg.C.

In a fifth aspect, the present invention provides the use of the two-component liquid silicone rubber adhesive of the fourth aspect for bonding aluminum substrates, stainless steel substrates, glass substrates or ceramic substrates.

Compared with the prior art, the invention has the following beneficial effects:

(1) the bi-component liquid silicone rubber adhesive provided by the invention solves the problem of harsh single-component addition type storage conditions in a bi-component mode, the temperature resistance and mechanical properties of the bi-component liquid silicone rubber adhesive are improved mainly by adding ferric oxide and fumed silica filler, and the silane in the self-made tackifier is matched with each other for synergistic interaction, so that the temperature resistance of the bi-component liquid silicone rubber adhesive is further improved, the addition type liquid silicone rubber adhesive has adhesive property, and the addition type liquid silicone rubber adhesive can be used for a long time under a high-temperature condition.

(2) After the high-temperature aging treatment, the shear strength of the bonded aluminum sheet of the bi-component liquid silicone rubber adhesive is still more than 1MPa, the shear strength of the bonded stainless steel is more than 0.85MPa, the shear strength of the bonded glass is more than 1MPa, and the shear strength of the bonded ceramic is more than 0.87 MPa.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.